Screencaps of the new trailer for Season 2:
http://imgur.com/a/Q6YtM
Picture #1: Emma and Kieran at the dock that Piper died on.
Picture #2: Jake hung upside down and taunted with a scythe.
Picture #3: Same as above but different angle.
Picture #4: The killer watching Brooke and Jake talk.
Picture #5: Emma getting stalked by someone (most likely the killer) in a car.
Picture #6: Same as above.
Picture #7: Audrey getting chased in a library.
Picture #8: Audrey looking at a dead body.
Picture #9: "See how I finished the job for you Audrey?" written on a dead body. This proves Audrey was involved.
Picture #10: Noah banging a door screaming for help.
Picture #11: The killer (with the costume version of the Brandon James mask) looking out a theater projection room.
